Forget those numbers. Shapes are way more fun! Shape Shifter is a geometric approach to the popular number matching puzzle game. How to play the game? It is extremely simple to play Shape shifter - the shape matching puzzle game. On the main screen, you can select the game mode - 3 x 3, 4 x 4, and 5 x 5 tiles. You will get different shape types during the course of your game.